Vterl 81 



■ !■! ...^ , ,»M. . — « ' 



fiiperknponendarum, & motu rer aguli reciprcco nrrnandarum 

 unionem, notandum judico , diftiaiiorem nonnunqu?jr\ effe tatc- 

 ralium Levrctian* forcipis lameitarura (quarovis tenuium) ope 

 clavi cochleati inftituendam didu&ionem, qu&m firmandam bra- 

 chiorum Chamberlaynia^ conjuncTionem , utpcte quae non abfo- 

 lute neceffaria eft. Nifi enim eadem absque ulla vi fua fponte fe 

 fe invicem excipiant, combinatio artificialis cmittemia , & loco 

 illius fola manuali binarum iamellarum compreffione capitis rite 

 inclufi extraftio fufcipienda. Pertinet haec cautela pra&ica ad cir- 

 cumjpeffam extraciiomm , quam antecedenti paragrapho com- 

 mendavimus, eommendatamque apud CHAPMANNVM gg) va- 

 riis ex rationibus legimus , quas inter refert, primo fub artificiali 

 binarum partium unione extrema earum fibi invicem nonnun- 

 quam haud e diametro refpondere, fed, ob mutatam diredionem, 

 conGeptu facileefle, quifiat, ut vel unica, vel binas lamellse fub 

 attraftione fpontc fecectant; fecundo facilius efle in non adunatis 

 cruribus forfan effugientem laminam in priftinurn reponere lo- 

 cum, quam.extrafta tota forcipe, denuo ipfius fufcipere adpiica- 

 tionem* Ipia qu©que experientia, optimarerum omnium ma- 

 App.Acl.Med.Fh.rol.lX* 1 giftra, 



gg) 1. e. p. 19. It it mucb betttr at Ihave iuft obftrvtd, that t tht tvvoPartt of 

 tht Borcept fhould not be joined or fixed bj a Screvv, tht Hand being fufficienty 

 and that for thefe Keafont, Firfl , beca&fe vvhen they are fcrew'd together 

 tho'iheyfh«uld not h*ppen to be exaQly oppnfite to each othcr, yet they vviU 

 turnfo a$ to take fajt Hdd of the lnfant*t kiead, and rcadily exirafi it. Se 

 tondlj > In Cdfe one of tbe tartt fhould flipy it it then eafily returned to itt 

 proper Poft , vvithout being takcn vvholiy avvay : Wht?tat vvbtn they are 

 fcrtvved togttbtr, and tktnflip off on onc fidc(yvbicb Ihave o/teu e*pcrienced t 

 in fptte of\tke greateft Care lcomld ufe) the Infirument it to be repajfdi and 

 fcrevved at atfir/r'. Ihey have oftentimet flipped , and vvben l exptticd the 

 Head of tbe C>4ld % l kave bten dectived , and fo%nd the Handlt fart comt 

 clofti the Inftrumtnt only in my Handt and the Wotk afi to do over again. 



